Wim Delvoye, Belgian conceptual artist. His famous installation piece is called ‘Cloaca’*In zoological anatomy, a cloaca is the posterior opening that serves as the only such opening for the intestinal, urinary, and (usually) genital tracts of certain animal species.The machine produces feces.The food which was prepared by first class chef was mixed with water, and poured into jars filled with acids and enzyme liquids. The machine processes the food as exactly as human body does. So after digestion, just like us, the machine produces shits. So it does smell.So far 13 museums have shown the smelly pieces. What happened to those poo? He sold them. You can have a look at his official site : http://www.cloaca.be/
It says all the feces were sold out. He even set up a company, designed the logo and hired a lawyer.